If the content is refreshed you will need to bing the event with the 'live' function. Read more about the .live at the Jquery documentation site. Regardless of this error i think there should be a property implemented into the CGridView that will attache the events with/without the live function.

I know the "live" function and already tested it with the datepicker.
Sadly no event like ready or load works for the calendar creation and with the on click event the datepicker takes too long for creation so you have to wait several seconds or click multiple times till the datepicker appears.

Do someone know how the afterAjaxUpdate Property works and if the jquery code of the filters and additional js code be handled via this?

the best thing would be if the gridview gets the js code of the used elements itself and process them after ajaxupdate. like it would normaly be done on a normal page refresh.

But it would be nice if the gridview would add those js code automatically for its containing elements like filters.
Is there any way to get the script code of a selected widget from the Yii::app Clientscript?
Or from the rendered html code from the ajax update?
e.g. get a specific part of the html code which contains the js code from the grid?